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<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=
    , initial-scale=1.0">
    <title>Document</title>
    <style>
        div::after{
            content:"我是女王";
            color:red;
        }
        div::before{
            content:"女王是谁";
            color:red;
        }
        p::first-letter{
            font-size:50px;
        }
        p::first-line{
            background:tomato;
        }
        p::selection{
            background-color: yellow;
        }
    </style>
</head>
<body>
    <div>
        谁是女王
    </div>
    <p>wwwwwwwwhhhhhhhhhhhhhhh</p>
</body>
</html>